<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['vcenter','bdbottom', i1 ===0 ? 'bdtop' : '']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>

              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for循环 嵌套渲染二级权限 -->
                <el-row :class="['vcenter',i2 === 0 ? '' : 'bdtop']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable
                            @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>

                  </el-col>

                  <el-col :span="8">
                    <el-tag type="warning"
                            v-for="(item3, i3) in item2.children"
                            :key="item3.id" closable
                            @close="removeRightById(scope.row, item3.id)">
                      {{ item3.authName }}
                    </el-tag>

                  </el-col>
                </el-row>
              </el-col>
            </el-row>

            <!--<pre>-->
              <!--{{ scope.row }}-->
            <!--</pre>-->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
            @click="RoleEdit(scope.row.id)">
              编辑
            </el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete"
            @click="RoleDelete(scope.row.id)">
              删除
            </el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting"
            @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>

    </el-card>

    <!-- 修改用户的对话框-->
    <el-dialog
      title="修改用户"
      :visible.sync="RoleEditVisible"
      width="50%" @close="RoleEditClosed">
      <el-form :model="RoleEditForm"
               ref="RoleEditRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="RoleEditForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="RoleEditForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
    <el-button @click="RoleEditVisible = false">取 消</el-button>
    <el-button type="primary" @click="RoleEditInfo">确 定</el-button>
  </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="SetRightDialogVisible"
      width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree  show-checkbox :data="rightslist" :props="treeProps"
                node-key="id" default-expand-all
                :default-checked-keys="defKeys" ref="treeRef">

      </el-tree>

      <span slot="footer" class="dialog-footer">
    <el-button @click="SetRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      //  所有权限的数据
      rightslist: [],
      //  所有角色列表数据
      rolelist: [],
      RoleEditForm: {},
      //  控制修改用户对话框的显示与隐藏
      RoleEditVisible: false,
      //  控制分配框权限对话框的显示与隐藏
      SetRightDialogVisible: false,
      //  这是树形控件的绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //  默认选中的节点Id值数组
      defKeys: [],
      //  当前即将分配权限的角色id
      roleId: []
    }
  },
  created(){
    this.getRolesList()
  },
  methods: {
    //  获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')

      if(res.meta.status !== 200){
        return this.$message.error('获取角色列表失败！')
      }

      this.rolelist = res.data

//      console.log(this.rolelist)
    },
    async RoleEdit(id) {
      const {data: res} = await this.$http.get('roles/' + id)
//      console.log(res)
      if(res.meta.status !== 200){
        return this.$message.error('查询角色列表失败！')
      }
      this.RoleEditForm = res.data
      this.RoleEditVisible = true
    },
    RoleEditClosed() {
      this.$refs.RoleEditRef.resetFields()
    },
    RoleEditInfo() {
      this.$refs.RoleEditRef.validate(async valid => {
//        console.log(valid)
        if(!valid) return
        //  发起修改用户信息的数据请求
        const {data: res} = await this.$http.put('roles/' + this.RoleEditForm.roleId,{
          roleName: this.RoleEditForm.roleName,
          roleDesc: this.RoleEditForm.roleDesc
        })
//  console.log(res)
        if(res.meta.status !== 200){
          this.$message.error('修改用户失败！')
        }
        this.$message.success('修改用户成功')
        //  隐藏添加用户的对话框
        this.RoleEditVisible = false
        //  重新获取用户列表
        this.getRolesList()
      })
    },
//    根据id删除对应的权限
    async removeRightById(role, rightId) {
        // 弹框提示用户是否要删除
        const confirmResult = await this.$confirm(
          '此操作将永久删除该文件, 是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除！')
        }
        const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if(res.meta.status !== 200){
          return this.$message.error('删除权限失败')
      }
      //  这样写的话，会重新刷新并关闭展开行，体验感不好
//      this.getRolesList()
      //  这样不会关闭展开行
      role.children = res.data
      },
    //  展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //  获取所有权限地址
      const {data: res} = await this.$http.get('rights/tree')

      if(res.meta.status !== 200){
        return this.$message.error('获取权限数据失败')
      }
      //  把获取到的权限数据保存到 data 中
      this.rightslist = res.data
//      console.log(this.rightslist)

      //  递归获取三级节点的Id
      this.getLeafKeys(role,
      this.defKeys)

      this.SetRightDialogVisible = true
    },
    //  通过递归的形式，获取角色下所有的三级权限的id，并保存在 defKeys 数组中
    getLeafKeys(node, arr){
      //  如果当前节点里没有children属性，则这就是三级节点
      if(!node.children){
        return arr.push(node.id)
      }

      node.children.forEach(item =>
      this.getLeafKeys(item, arr))
    },
    //  监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      this.defKeys = []
    },
    //  点击为角色分配权限
    async allotRights(){
      const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const {data: res} = await
        this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})

      if(res.meta.status !== 200){
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
//      console.log('1')
      this.getRolesList()
//      console.log('2')
      this.SetRightDialogVisible = false
//      console.log('3')
    }
  }

}
</script>

<style lang="less" scoped>
  .el-tag{
    margin:7px;
  }
  .bdtop{
    border-top: 1px solid #eee;
  }
  .bdbottom{
    border-bottom: 1px solid #eee;
  }
  .vcenter {
    display:flex;
    align-items: center;
  }
</style>
